Vehicle Emission Inspections

At Applus+ Automotive, we are committed to sustainability and environmental protection. As part of this commitment, we conduct periodic emissions inspections, ensuring that vehicles comply with environmental regulations throughout their lifespan.

Our emissions control services are often combined with comprehensive safety inspections to provide an integrated solution. Through these procedures, we ensure that vehicle exhaust emissions remain within the reference values established at the time of the vehicle's type approval.

As a result, Applus+ plays a crucial role in protecting the environment and the air quality we breathe. During each inspection, we perform specific tests to verify pollutant emissions, measuring levels of carbon monoxide (CO) and carbon dioxide (CO₂) in exhaust gases, as well as smoke opacity in diesel engines. Additionally, for modern vehicles equipped with on-board diagnostics (OBD), we perform electronic verification to detect faults in emissions control systems.

The inspection also includes leak detection, ensuring that there are no oil, fuel, or fluid leaks that could contaminate the ground or groundwater. Regarding noise pollution, we verify that the noise levels generated by the exhaust system comply with the limits set by current regulations.

We have a team of highly qualified inspectors and cutting-edge technology to conduct accurate inspections for all types of vehicles.

We work closely with governments at the municipal, regional, national, and international levels to create customized solutions that contribute to improving air quality and road safety. Thanks to our expertise and commitment, we guarantee an effective, reliable, and high-quality emissions inspection service. This allows us to adapt to the latest technological advancements in modern vehicles, incorporating new measurement techniques such as nitrogen oxides (NOx) and particulate number (PN) analysis, which are crucial for reducing the environmental impact of transportation.

At Applus+ Automotive, we also adapt to the new challenges of sustainable mobility. Although electric and hybrid vehicles produce fewer emissions than traditional combustion vehicles, it is essential to assess their environmental impact and operational safety. We actively participate in various legislative groups at national and European levels to improve current inspection procedures and integrate new automotive technologies. From personal mobility vehicles such as e-scooters to electric cars, we address the new challenges of modern transportation.

SERVICE DESCRIPTION

The testing procedures may vary depending on the region. However, in general, the following inspections are carried out:

Spark-Ignition Engines (Gasoline Vehicles)

The emissions test is performed with the engine at normal operating temperature.

A visual inspection of the exhaust system is conducted to verify its integrity and detect possible leaks.

Carbon monoxide (CO) levels are measured at idle speed and, when applicable based on the vehicle's registration date, also at accelerated speed to comply with the established limits.

For OBD-equipped vehicles, depending on the Euro emissions standard, an electronic reading is performed to verify the proper functioning of the emissions control systems, ensuring no error codes are stored and that all required monitors are complete.

Compression-Ignition Engines (Diesel Vehicles)

A visual inspection of the exhaust system and emissions control components is conducted.

The main test consists of measuring smoke opacity using a certified opacity meter, performing several free accelerations until the maximum engine speed is reached.

Before taking measurements, we verify that the engine is at normal operating temperature and in proper mechanical condition.

For OBD-equipped vehicles, depending on the Euro emissions standard, the inspection is complemented by reading the vehicle's control unit, checking for error codes and monitoring system status.

The obtained values must comply with the legal limits based on the vehicle's registration date.

Noise Control

The noise level assessment begins with a visual inspection of the exhaust system, ensuring its integrity and the presence of all required components.

We verify that mufflers and other exhaust elements are free from breaks, leaks, or modifications that could increase noise levels.

Depending on the vehicle type, we use a certified sound level meter to measure noise levels.

The measurement is conducted with the vehicle stationary, following the official procedure for microphone positioning and engine speed.

The measured values must comply with the maximum permissible noise limits based on the vehicle’s category and registration date.

Vehicles Running on Gas (LPG, CNG, LNG)

The gas installation and components undergo a specific verification to ensure compliance with safety regulations.

A visual inspection checks the condition and mounting of gas tanks, pipes, and other gas circuit components, ensuring no damage or corrosion.

A leak test is performed to detect potential gas leaks, using specific detectors or a soap-water solution at the connection points.

The emissions measurement follows the same procedure as for gasoline vehicles, verifying CO levels at idle and, when applicable, at accelerated speed.

For OBD-equipped vehicles, the control unit is read to ensure the correct operation of the gas system.

Fluid Leak Detection

A thorough visual inspection is performed on all vehicle components containing fluids.

We verify that there are no leaks in the engine lubrication system, transmission, power steering, cooling circuit, or braking system.

We check for oil stains, drips, or grease accumulation that could indicate active or intermittent leaks.

We inspect seals, gaskets, and hoses, ensuring they are in good condition to prevent leaks.

This inspection is essential not only for vehicle safety but also to prevent environmental contamination from hazardous fluid spills.